Continuous insect film



Feb. 12, 1963 F. MAKARA 3,077,050

CONTINUOUS INSECT FILM Filed May 26, 1961 IOY United States Patent 3,077,059 l CGNTXNUUUS ENSECT FILM Frank Mahara, 29 Orange Drive, Jericho, N.Y. Filed May 26, 1961, Ser. No. 123,335 1 Claim. (Cl. 43-112) This invention relates to a combined ventilation and electrical screen.

It is an object of this invention to provide a plastic flexible ventilation screen used also as an insect killer.

It is a further object to provide. a rollable continuous screen so that it may be selectively cut-off and sold as yard goods. I

It is another object to provide an electrical screen which is used as an insect killing screen while acting as a ventilation screen.

These and other objects of this invention will become apparent upon reading the following descriptive disclosure taken in connection with the accompanying drawing in which:

FIG. 1 is a perspective view of an open window having the screen adhesively secured to the respective edges of the window framework.

FIG. 2 is a schematic simplified view of a continuous plastic sheet having transverse slots therein and rolled up with the free end pulled out and broken away, showing the plastic screen construction as having printed electrical spaced-apart conduits thereon,

FIG. 3 is a view of a portion of a perforated plastic modified screen having spaced-apart transverse printed metal strips thereon, said screen being provided with a pair of metal side or longitudinal conduits at its edges engaging electrically said printed metal strips in alternate relationship, said side conduits being adapted to engage electrical connectors,

FIG. 4 is an end view of a portion of the screen of FIG. 3,

FIG. 5 is an exploded view of a modified three component screen having a plastic backing woven screen, a plastic perforated sheet having suitable metal printed spaced-apart conduits thereon and an undulating border foil conduit secured to said metal printed conduits of said plastic sheet,

FIG. 6 is an end view of the screen of FIG. 2 showing the manner of efiecting electrical hook-up to the leads thereon,

FIG. 7 is a partial front view of the plastic screen of FIG. 2 modified to show the use of a plurality of small apertures in lieu of small slots, and

FIG. 8 is a perspective view of an electrical connector used to engage the border conduits of the screens of FIGS. 3 and 4.

This invention consists essentially of a thin rollable continuous electrical insulation plastic sheet 10 made from, for example, polyethylene, or any conventional flexible plastic material, such as rubber, synthetic rubber, cellophane and the like.

The continuous plastic sheet is preferably perforated with a plurality of selective apertures, slots 11 or circles 12, for purposes of atmospheric ventilation and of a size not to permit passage of insects.

The plastic sheet 10 is provided with metal printed transverse conduits 13 and 14 made from suitable paint having for example, aluminum or brass particles or alloys. The conduits l3 and 14 are continuously printed upon a continuously moving plastic sheet iii. The mode of printing may be suitable metal paints having a suitable volatile thinner, for example, acetone therein. The printed strip after heat drying to remove volatiles may be subjected to further heat treatment, for example, by infrared lamps, to fuse the metal particles into a homogeneous mass without deleteriously effecting the plastic sheet 19.

- 10y containing stainless steel printing roller adapted to re-.

Alternatively a suitable low melting point molten alceive said molten metal alloy in the roller grooves thereof and transfer the metal in a semi-cooled state to a continuously moving plastic sheet 10 in contact with the alloy containing roller.

The printed conduits may be only the transverse spacedapart conduits 13 and 14 to which flexible metal foil border strips 15 and 15X are then fused (FIG. 3), or as shown in FIGS. 2 and 6, the border strip 17 may be of thicker dimensions printed upon the plastic sheet 10 simultaneously with the respective transverse conduits 13 and 14 using the same printing composition.

As shown in FIG. 3, the transverse conduits 13 and 14- are parallel but suitably spaced-apart. The conduits 13 extend leftwardly close to the longitudinal edge 19 of sheet it) whereas the conduits 14 extend toward the longitudinal edge 20 of the plastic sheet 10.

Also as shown in FIG. 3, border conduits 15 and 15X of suitable flexible metal foil, for example, brass or aluminum, is contactingly united to all the transverse conduits l3 and 14 adjacent their exterior ends 13X and 14X respectively. The metal foils 15 and 15X are secured to the conduits 13 and 14 by the use of suitable solder or by spot welding.

The longitudinal metal strips 15 and 15X preferably of foil, are provided with expanded prong-receiving curved slots 21 by dome shaping the conduits. Prongs 22 (FIG. 8) having a V-shaped configuration and preferably made of brass are inserted in the slots 21 to effect a firm seizure of a prong 22 therein.

In the mod'fication of FIG. 6 wherein relatively thick border conduit 17 is printed upon the sheet 10, suitable metal screws 23 for securing electrical wires may be employed.

An electrical wire 25 when secured to a screw 23 or spring clip 22. to conduit 15 leads to a conventional plug 26. A second electrical wire 25X leads to the other screen conduit 15X (FIGS. 1 and 3).

The plug 26 is disposed in an electrical circuit of suitable voltage, for example, 10 volts or less, or to a trans former outlet, transforming the conventional volt household circuit into a circuit of the desired voltage.

As shown in FIG. 5, a three component screen may be used, and is prepared from perforated plastic sheet it having lateral printed conduits 13 and M- thereon. A longitudinal modified metal foil conduit 16 having a plurality of spaced-apart elevated linearly disposed domes MX is united to the respective free ends of each of the lateral conduits 13 and 14 respectively. The foil conduits 16 are made integral with the respective lateral conduits 13 and 14 by means of spot welding.

In the modification of FIG. 5, the plastic sheet 19 is made from thermoplastic resin and the plastic screen 2 is made from a suitable or identical thermoplastic resin. In this event, the heat fusion of sheet 10 to screen 2 rnay be effected simultaneously with the heat fusion of foil 16 to the conduits l3 and 14. The use of a tightly woven screen 24 permits large slots 11 and functions as a barrier against even the smallest insects.

The manufactured screen, being flexible is shipped as a tightly rolled-up unit. The consumer purchases as great a length of the roll as he desires to fit his window or door and this amount is cut from the free of the roll.

The plastic screen is provided with longitudinal border areas WY suitable for receiving tacks for securing the plastic screen to a wooden window frame.

This invention includes the concept of adheringly disposing the transverse conduits 13 and 14 and the respective longitudinal conduits united thereto upon a plastic pliable or resilient screen 24.

This invention is illustrated herein by a plurality of 3 embodiments, but it is not limited to these embodiments but only to the claim herein.

I claim:

As an article of manufacture, a rollable combination ventilation and electrical screen adapted to killing insects comprising a thin continuous longitudinal plastic film having a plurality of suitably spaced-apart transverse rows of suitable small apertures; a longitudinal continu ous metal electrical conduit printed upon and disposed adjacent each longitudinal edge of said film; a plurality of first metal electrical transverse conduit printed integrally with one of said longitudinal conduits and extending suitably toward the other longitudinal conduit between respective transverse roWs of apertures; a second plurality of metal electric transverse conduit printed integrally with the other of said longitudinal conduits suitd ably close to said first transverse conduit between each respective row of apertures: and extending toward said first longitudinal conduit and- Wire attachment means for securing each of said longitudinal metal printed conduits to a conventional source of electrical current.

References Cited in the file of this patent UNITED STATES PATENTS i l y i 

